Higher Computing Networking 1

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1 Networking Briefly state what is meant by a computer network. What does the term topology refer to in this context? What are the ideal goals a network designer should aim for? Compare and contrast a star topology with a ring topology in terms of the potential effects of: (i) a single node failure (ii) a single channel failure. Discuss the relative advantages of a star topology over another topology of your own choosing. 5 How is the integrity of a ring network maintained when a node fails? 6 Define the term Local Area Network. Which topologies are most usually associated with LANs? 7 What are the characteristics of a LAN? 8 List the potential benefits and pitfalls of using a LAN. 9 Expand the acronym CSMA/CD. How does CSMA/CD substantially reduce the chance of simultaneous transmissions and collisions? 0 Distinguish between the CSMA/CD Listen Before Talking and the Listen While Talking strategies. How may stations be added to an Ethernet LAN? How can Ethernet LANs be extended? What type of applications are unsuitable for Ethernet and other bus topologies? Give a reason for your answer. What is meant by the term frame or packet with respect to Ethernet? 5 What is the purpose of the padding in an Ethernet frame? Total = 7

2 Studies The school has a number of stand-alone computers set up in the Open Learning Centre. It has been suggested that this should be changed into a peer-to-peer network. Give two advantages of networking the computers. Give two concerns that the school s IT Manager might have in relation to the operation of the network. The Principal Teacher of Computing has suggested that the computers be connected to his client/server network. List three differences between a peer-to-peer network and a client/server network.. The server must use a network operating system. What additional features must a network operating system have over the operating system on a stand alone computer? 5. Describe three different forms of cabling which could be used for the installation. The IT Manager decides to go ahead with the Principal Teacher s suggestion, but finds that the length of cable required to connect the Open Learning Centre to the file server is greater than the maximum length recommended. To overcome this, he decides to connect the six computers to a hub, half way between the two points. 6. What is the purpose of the hub in this instance? 7. What other hardware device could have been used instead of a hub. Explain your answer. The Computing Department s network is an example of a star topology, as opposed to the Business Studies Department s bus topology. 8. Give one advantage and one disadvantage of a star topology over a bus topology. Total = 7

3 . What is a local area network?. Give two examples of situations where you might find a local area network.. What functions are likely to be served by a local area network?. What hardware is required for a local area network? 5. Many LANs will use a client server arrangement. Describe the differences between the client and the server. 6. Describe three different forms of cabling often used in LANs. 7. What is the purpose of a repeater? 8. What is a hub? 9. Describe, using diagrams, three network topologies. 0. What functions must a network operating system have that are not required in a stand alone system?. What is the purpose of Ethernet?. Describe how file sharing can be achieved in a LAN.. What is meant by bandwidth and how does this affect the performance of a network?. What security measures are required in a LAN? 5. What is meant by a communications protocol? Total = 6

4 . Name and describe a method of addressing which is used in a local area network.. Name and describe a method of addressing which is used in a wide area network.. What is data encryption?. Describe the function of each of the following protocols: a. PPP b. SMTP c. HTTP d. POP e. FTP 5. What is the purpose of remote log-in? 6. Describe the function of each of the following data standards: a. RTF b. MPEG c. JPEG d. HTML 7. Describe the standard format of an address. 8. Explain why computer networks are said by some to cause social isolation of an individual. 9. Describe how each of the following economic factors have influenced the development of computer networks. a. cost of communications technology b. access to expensive equipment c. geographic spread of organisations. 5 Total =

5 5. Select five rules of network etiquette and write a short note on why you think each is needed.. Describe the advantage associated with each of the following network tasks: a. sending b. accessing the WWW c. file transfer d. printer sharing. Describe an application of each of the following: a. local area network b. intranet c. wide area network d. Internet. Explain why computer networks are said by some to invade the privacy of an individual. 5. Give a specific example of a development resulting from each of the following technical factors: a. adoption of Internet technology b. adoption of international standards c. development of communication strategy 6. Draw a diagram of the topology of the school local area network. 7. Describe the characteristics of the school local area network in terms of the following: a. hardware b. software c. communications d. functionality e. security 0 5 Total = 0

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